diff --git a/supabase/functions/send-escalation-notification/index.ts b/supabase/functions/send-escalation-notification/index.ts
index 04b5b778..1f3742cc 100644
--- a/supabase/functions/send-escalation-notification/index.ts
+++ b/supabase/functions/send-escalation-notification/index.ts
@@ -165,7 +165,7 @@ serve(async (req) => {
     const emailResponse = await fetch('https://api.forwardemail.net/v1/emails', {
       method: 'POST',
       headers: {
-        'Authorization': `Bearer ${forwardEmailApiKey}`,
+        'Authorization': 'Basic ' + btoa(forwardEmailApiKey + ':'),
         'Content-Type': 'application/json',
       },
       body: JSON.stringify({